"Unfortunately, many of the logic chips that make up Pong are no longer readily available. There are newer parts that will perform the same function but they have different pin connections. I started by re-drawing and adapting some the circuits to the available parts." Recreating Pong from scratch. In its original hardware form. Crazy cool.

When I was back in college, 1 particular grad student had his very own ICL 1904 built out of transistor boards working in a spare room. As each board failed he would wire up a TTL logic board replacement work alike.